Figure 3 | Scientific Reports

Figure 3

From: Submarine metalliferous carbonate mounds in the Cambrian of the Baltoscandian Basin induced by vent networks and water column stratification

Figure 3

Thin-section photomicrographs (under crossed nichols) of in-situ calcite blankets at Bruddesta. (A) Polymetallic basal breccia forming the Kakeled Limestone Bed rich in sulphide crusts and clasts (opaque minerals), subrounded quartz grains, calcite and apatite (marked by blue arrows) clasts, and linguliformean brachiopods (red arrows). (B) Calcite pseudomorphs after anhydrite embedded in the limestone rich in zoned crusts of polymetallic sulphides. (C,D) Arrangement of cloudy (a) and clean (b) calcite crystals in a crust. (E) Crosscutting relationships between ca1 (a), ca2 (b) and ca3 (c) glendonitic phases. (F) Feathery crystals of calcite forming the base of a crust; all scale bars = 1 mm.

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